[Coco] I give up on .ar files
Robert Gault
robert.gault at worldnet.att.net
Wed Feb 20 07:46:57 EST 2008
Neil Morrison wrote:
>
> I once tried to figure out the algorithms used with little success.
> Anyone else?
>
> Neil
>
> ----- Original Message ----- From: "L. Curtis Boyle"
> <curtisboyle at sasktel.net>
>
>> Does the command run ok on it's own (can you get a help screen by
>> typeing 'AR -?', for example)? I am wondering if it is a attributes
>> thing, or if it is a different version of AR (!.3, 1.4 and 2.0 all had
>> different, incompatible schemes).
>
Ar uses an lz compression scheme. I have a distribution for AR13 that is
just C-language source code.
As to changes between versions, it may just be a single byte in the
header sections. That is true for ar12 and ar13 where byte $4E in each
header is 2 or 3 respectively.
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